If you know these people and grew up around them and in that culture, it actually isn't at all surprising. The loathing and fear of many social conservatives for anything LGBTQ related is off the charts. Many of them probably would rather lose their welfare benefits and struggle under Trump than give rights or acceptance to LGBTQ people. But yeah, it is definitely insane in the greater scheme of things. The rest of us have to suffer so they can feel safe that a transgender person isn't playing girls' sports or might use a woman's public restroom somewhere.